I was looking at my 'Websites' list - it isn't an option for my Instant site on that page - when it is available for all the normal sites listed there.
But as you say Eccles, you can set things up by following the link you pointed to.
My Freeola Instant Site
Not quite sure what you mean here. If you login to your MyFreeola control panel and go to 'Free Website Promotion' your instant site is listed and you can setup promotion there. It work on you wife's account, I just tried!
If I've miss understood then let me know the Instant Site you are having problems with and the URL of the page in your MyFreeola account that you are talking about and I will look into it.